form 组件

https://www.cnblogs.com/wupeiqi/articles/6144178.html

class F2Form(forms.Form):
    title1=fields.CharField()
    detail=fields.CharField(
        widget=widgets.Textarea
    )
    processer=fields.CharField(

        widget=widgets.Select(choices=models.UserInfo.objects.values_list('nid','username'))
    )

def edit_trouble(request):
    if request.method=='GET':
        id=request.GET.get('p')
        print(id)
        c=models.Trouble.objects.filter(id=id).all().first()
        print(c.title)
        print(c.processer.username)
        data={}
        data['title1']=c.title
        data['detail']=c.detail
        data['processer']=c.processer_id

        obj=F2Form(data=data)

        return render(request,'edit.html',locals())
    else:
        obj=F2Form(request.POST)
        if obj.is_valid():
            print(obj.cleaned_data)

            return HttpResponse('ok')

通过form组件实现保留上次的值